(from wikipedia.en) Matilda of Frisia (died 1044) was the first wife and first Queen of Henry I, King of the Franks. She was the daughter of Liudulf, Margrave of Frisia and Gertrude. Her date of birth is unknown.

She and Henry were married in 1034 after the death in 1033 of his fiancée, also named Matilda (1027-1033), daughter of the Emperor Conrad II. She died in 1044 during a Caesarean section. Henry married Anne of Kiev after her death.